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POSetting preference layout and changing the attribute in it
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  1. POSetting preference layout and changing the attribute in it
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    copied!<p>is it possible to access programmatically a layout which is set to a Preference?</p> <p>Here is what I have, a very simple project - proof of concept</p> <p>The Preference Activity:</p> <pre><code>package com.example; import android.os.Bundle; import android.preference.PreferenceActivity; import android.util.Log; import android.view.View; public class PreferenceExampleActivity extends PreferenceActivity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.preferences); ImageView v = (ImageView) findViewById(R.id.iconka); } } </code></pre> <p>The resource XML:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" android:key="settings"&gt; &lt;PreferenceCategory android:title="Category Setting Name" android:order="1" android:key="Main"&gt; &lt;Preference android:order="1" android:title="Setting" android:summary="Setting1" android:layout="@layout/profile_preference_row" android:key="profile" /&gt; &lt;/PreferenceCategory&gt; &lt;/PreferenceScreen&gt; </code></pre> <p>The custom layout for the Preference:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/widget_frame" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="?android:attr/listPreferredItemHeight" android:gravity="center_vertical" android:paddingRight="?android:attr/scrollbarSize"&gt; &lt;RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="15dip" android:layout_marginRight="6dip" android:layout_marginTop="6dip" android:layout_marginBottom="6dip" android:layout_weight="1"&gt; &lt;TextView android:id="@+android:id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:singleLine="true" android:textAppearance="?android:attr/textAppearanceLarge" android:ellipsize="marquee" android:fadingEdge="horizontal" /&gt; &lt;TextView android:id="@+android:id/summary" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@android:id/title" android:layout_alignLeft="@android:id/title" android:textAppearance="?android:attr/textAppearanceSmall" android:textColor="?android:attr/textColorSecondary" android:maxLines="4" /&gt; &lt;/RelativeLayout&gt; &lt;ImageView android:id="@+id/iconka" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>What I want is to be able to access the "iconka" ImageView from the Activity and change the image from there. I am using API 8 (Android 2.2)</p> <p>Currently the "v" is null and I don't have any idea why is that.</p> <p>A hint will be much appreciated!</p> <p><strong>Update - The Solution:</strong> Actually, I needed a custom preference which I can modify for my needs. This one is a practical guide how to create your own Custom preference in your project: <a href="http://android-journey.blogspot.com/2010/01/for-almost-any-application-we-need-to.html" rel="noreferrer">Android &amp; Amir - Android Preferences </a> See the part when the author creates a custom preference class.</p>
 

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